"I thought, 'Wouldn't it be cool if this book was put to music?'" she said. "So I thought, 'You know who might be the perfect person? The amazing Kelly Clarkson. Maybe she could put the words that have been in my head into a song.'"

Kotb shared a behind-the-scenes video of the recording process with Clarkson before debuting the song on the morning show.

"I made it more like a lullaby, like James Taylor, like there's kind of some Patty Griffin in it," Clarkson tells Kotb in the clip. "I hope we do it justice."

I've Loved You Since Forever is inspired by Kotb's daughter, Haley Joy, whom she adopted in February 2017. Kotb is raising her baby girl with boyfriend Joel Schiffman, and reunited with her family last week after covering the Olympics.